Health System Administration

John Warner, M.D.

Executive Vice President for Health System Affairs and Professor, Department of Internal Medicine

John Warner, M.D.

Holder of the: 

  • Nancy and Jeremy Halbreich, Susan and Theodore Strauss Professorship in Cardiology
  • Jim and Norma Smith Distinguished Chair for Interventional Cardiology

After leading UT Southwestern University Hospitals as CEO since February 2012, John Warner, M.D., was named Executive Vice President for Health System Affairs, as of March 1, 2018. As the EVP, he oversees the UT Southwestern clinical enterprise, which encompasses the delivery of care to more than 105,000 inpatients and approximately 3 million outpatient visits annually at UT Southwestern facilities on and off campus and at UT Southwestern-affiliated hospitals and clinics.

An interventional cardiologist, Dr. Warner has previously served as the Medical Director of the Doris and Harry W. Bass, Jr. Clinical Center for Heart, Lung and Vascular Disease and as Assistant Vice President for Hospital Planning. In that position, he was instrumental in leading the planning effort, along with President Podolsky, for the design and planning of UT Southwestern’s 460-bed William P. Clements Jr. University Hospital, which opened in December 2014.

Dr. Warner received his medical degree from Vanderbilt University, and he completed residency training in internal medicine at UT Southwestern, where he served as Chief Resident. He did his fellowship training in cardiovascular disease and interventional cardiology at Duke University Medical Center and he was on the faculty at Duke until he returned to UT Southwestern in 2003. Dr. Warner subsequently received a Master of Business Administration degree from the Physician Executive MBA program at the University of Tennessee. He served as President of the American Heart Association for 2017-18.


Will Daniel, M.D.

Vice President and Chief Quality Officer

Will Daniel, M.D.

Holder of the:

  • William T. Solomon Professorship in Clinical Quality Improvement at UT Southwestern Medical Center

Will Daniel, M.D., a leader in driving clinical improvement, quality measures, and measureable outcomes, as well as positive transformational changes, was named Vice President and Chief Quality Officer in November 2016.

Most recently, Dr. Daniel was Vice President and Chief Quality Officer for Saint Luke’s Health System in Kansas City, Missouri, a 10-hospital system that has won national recognition for quality.

He received his undergraduate degree from Princeton University, then earned his M.D. at UT Southwestern Medical School in 1990. After completing his residency at Washington University/Barnes Hospital in St. Louis, he returned to UT Southwestern for a cardiology fellowship. He also completed an advanced cardiovascular interventional fellowship at Saint Luke’s Mid America Heart Institute. Dr. Daniel served as a Clinical Professor of Medicine at the University of Missouri in Kansas City and as the Medical Director for Quality for the Mid America Heart Institute.


Mack Mitchell, M.D.

Vice President for Medical Affairs and Professor, Department of Internal Medicine

Mack Mitchell, M.D., M.B.A.

Holder of the:

  • Nancy S. and Jeremy L. Halbreich Professorship in Gastroenterology

Mack Mitchell, M.D., a Professor of Internal Medicine, is the UT Southwestern Vice President for Medical Affairs. He is also the Chief Medical Officer for the Southwestern Health Resources Physician Network. Dr. Mitchell’s clinical expertise is in gastroenterology and liver diseases, and his research has been focused on alcoholism.

He earned his medical degree from Johns Hopkins University School of Medicine, where he was elected to Alpha Omega Alpha, and he has been listed repeatedly as one of D Magazine’s Best Doctors in Dallas.

Before coming to UT Southwestern, Dr. Mitchell was the Chief of Gastroenterology and the Medical Director of Ambulatory Services at Johns Hopkins Bayview Medical Center; the Chairman of Internal Medicine at Greater Baltimore Medical Center; and the Chairman of Medicine at Carolinas Medical Center in Charlotte, North Carolina.

He is currently President of ABMRF/The Foundation for Alcohol Research, and was recently honored with the Seixas Award for Distinguished Service by the Research Society on Alcoholism.


John Douglas Rutherford, M.D.

Vice President for Clinical Operations and Professor, Department of Internal Medicine

John Douglas Rutherford, M.D.

Holder of the:

  • Jonsson-Rogers Chair in Cardiology

John Douglas Rutherford, M.D., serves as Vice President for Clinical Operations at UT Southwestern Medical Center and holds a Chair in Cardiology. He joined the UT Southwestern faculty as Professor of Medicine in 1993 and received the Distinguished Physician Award in recognition of outstanding individual contributions to Parkland Memorial Hospital in 1995 and the Gifted Educator Award from the American College of Cardiology in 2011.

Dr. Rutherford, who earned his medical degree from the University of Otago in his native New Zealand, was the recipient of a traveling research fellowship from the New Zealand National Heart Foundation and was a Research Fellow in Medicine at Harvard Medical School.

Dr. Rutherford was recruited to the Harvard faculty in 1978 as a cardiologist and later was appointed co-director of the Samuel A. Levine Cardiac Unit at Brigham and Women’s Hospital in Boston.


Marcia Schneider, MBA

Vice President, Health System Strategy and Business Development and Chief Strategy Officer

Marcia Schneider

Marcia Schneider rejoined UT Southwestern in February 2019 as Vice President, Health System Strategy and Business Development and Chief Strategy Officer.

A veteran health care system executive, Ms. Schneider directs the strategic planning, business development, and health care delivery system transformation for the UT Southwestern Health System.

Previously, she was Assistant Vice President for Health System Planning and Performance at UT Southwestern, supporting the strategic development of the UT Southwestern-Texas Health Resources collaboration and the resulting Southwestern Health Resources network. She also led the planning and programming for UT Southwestern’s William P. Clements Jr. University Hospital, which opened in December 2014.

Most recently, she was Vice President of Administration at Baylor Scott & White Health, leading operational transformation.

Ms. Schneider holds a Bachelor of Arts in Biology from the University of Texas at Austin and a Master of Business Administration from the University of Texas at El Paso.


Carlos Girod, M.D.

Associate Vice President, Parkland Health & Hospital System Affairs

Carlos Girod, M.D.

Holder of the:

  • Ron Anderson, M.D. Professorship in Clinical Care and Education at Parkland Memorial Hospital

Carlos Girod, M.D., was named Associate Vice President, Parkland Health & Hospital System Affairs in March 2016. He is the primary liaison between Parkland and UT Southwestern Medical Center. He previously served as Vice Chair of Clinical Affairs for Parkland Health & Hospital System.

A pulmonologist and highly regarded clinician, Dr. Girod graduated from the University of Pennsylvania before earning his medical degree from the University of Puerto Rico School of Medicine in San Juan. He completed his internship and residency at UT Southwestern, followed by a clinical fellowship at the University of Colorado School of Medicine, and a research fellowship at the Denver Veterans Administration Medical Center. He joined the UT Southwestern faculty in 1997. 


Susan Hernandez, MBA, B.S.N., RN

Associate Vice President and Chief Nursing Executive, University Hospitals

Susan Hernandez, R.N., M.B.A.

A nationally respected nursing leader, Susan Hernandez, MBA, B.S.N., RN, joined UT Southwestern in 2014 as the Chief Nursing Officer. In 2015, she moved into her current role as Chief Nursing Executive. Ms. Hernandez oversees more than 3,000 nurses and nurse practitioners, who together provide care for 200,000-plus patients each year in two acute care hospitals and affiliated primary and specialty care clinics.

Under her direction, UT Southwestern’s University Hospitals earned Magnet® recognition from the American Nurses Credentialing Center (ANCC) in 2016. The designation is the nation’s highest form of recognition for nursing excellence and serves as a benchmark for quality of care.

Prior to joining UT Southwestern, Ms. Hernandez spent nearly 20 years in nursing and leadership positions at Vanderbilt University Medical Center. She holds bachelor’s degrees in nursing and education as well as an MBA with a focus in health care administration.